CN218913604U

CN218913604U - Three-gear speed change mechanism of reduction gearbox

Info

Publication number: CN218913604U
Application number: CN202222869956.8U
Authority: CN
Inventors: 罗刚; 周飞
Original assignee: Chongqing Nanbian Electromechanical Co ltd
Current assignee: Chongqing Nanbian Electromechanical Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-04-25
Anticipated expiration: 2032-10-28

Abstract

The utility model relates to the technical field of reduction boxes, in particular to a three-gear speed change mechanism of a reduction box, which comprises a spline shaft, wherein an output gear is fixedly arranged on the spline shaft, a spline housing is arranged on the spline shaft, a gear shifting sliding sleeve is arranged on the outer side of the spline housing in an axial sliding manner, a first-gear speed change gear set, a second-gear speed change gear set and a three-gear speed change gear set are arranged on the spline shaft in an idling manner, and the spline housing is respectively matched with the first-gear speed change gear set, the second-gear speed change gear set and the three-gear speed change gear set in a power transmission manner through the gear shifting sliding sleeve in a sliding manner, so that 3 power transmission working modes are respectively formed. The gear shifting structure is simple, the gear shifting sliding sleeve is driven to move only through the single shifting fork to finish the switching, the operation is simple and convenient, the used transmission components are few, the production cost and the later maintenance cost are reduced, the assembly speed of the reduction gearbox is improved, and the stability and the reliability of the reduction gearbox are improved; the friction loss is less in use, and the energy utilization rate is improved.

Description

Three-gear speed change mechanism of reduction gearbox

Technical Field

The utility model relates to the technical field of reduction boxes, in particular to a three-gear speed change mechanism of a reduction box.

Background

The reduction gearbox is also called as a speed reducer or a speed reducer, and works according to the principle that the prime mover is connected with the reduction gearbox, and the reduction gearbox is connected with the working machine, so that the reduction gearbox is power transmission equipment.

At present, the reduction gearbox is mostly first gear speed change and second gear speed change, if the switching of a plurality of gears is needed, a plurality of transmission shafts and a plurality of shifting fork shafts are needed to be switched, the transmission structure is complex, the number of practical transmission components is large, the manufacturing cost of the reduction gearbox is increased, the assembly difficulty of the reduction gearbox is improved, the stability and the reliability of the reduction gearbox are also affected due to the complex structure inside the reduction gearbox, in addition, the loss of kinetic energy in the transmission process is large due to the fact that the transmission components are large, the energy waste is caused, the damage rate of the transmission components is high, and the later maintenance cost is large.

Disclosure of Invention

The utility model mainly aims to provide a three-gear speed change mechanism of a reduction gearbox, which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a three-gear speed change mechanism of reducing gear box, includes the integral key shaft, set firmly output gear on the integral key shaft, be equipped with the spline housing on the integral key shaft, the spline housing outside is provided with the gear shift sliding sleeve along the axial slip, still idle running cover is equipped with first gear speed change gear set, second gear speed change gear set and three gear speed change gear set on the integral key shaft, slides on the spline housing through the gear shift sliding sleeve, makes the spline housing respectively with first gear speed change gear set, second gear speed change gear set and three gear speed change gear set power transmission cooperation, forms 3 kinds of power transmission operating modes respectively.

Further, a gear shift key groove is arranged on the outer side of the spline housing, gear shift key teeth matched with the gear shift key groove are arranged in the gear shift sliding sleeve, the gear shift key teeth are arranged at positions, close to two ends, in the gear shift sliding sleeve, and gaps are reserved between the gear shift key teeth at the two ends.

Further, the first-gear speed change gear set is located on one side of the spline housing, the first-gear speed change gear set comprises a first-gear input gear and a first-gear driving wheel, the first-gear driving wheel is fixedly arranged on one side surface, close to the spline housing, of the first-gear input gear and is coaxially arranged, and a first-gear key slot matched with a gear shift key tooth on the gear shift sliding sleeve is formed in the first-gear driving wheel.

Further, the second-gear speed change gear set is located at the other side of the spline housing corresponding to the first-gear speed change gear set, the second-gear speed change gear set comprises a second-gear input gear, a second-gear driving wheel and a connecting sleeve for connecting the second-gear input gear and the second-gear driving wheel, the second-gear input gear, the second-gear driving wheel and the connecting sleeve are coaxially arranged, and a second-gear key slot matched with a gear-shifting key tooth on the gear-shifting sliding sleeve is formed in the side face of the second-gear driving wheel.

Further, the three-gear speed change gear set comprises a three-gear input gear and a three-gear driving wheel, the three-gear input gear and the three-gear driving wheel are positioned between the two-gear input gear and the two-gear driving wheel, the three-gear speed change gear set is sleeved on the outer side wall of the connecting sleeve in a free rotation mode, the three-gear driving wheel is fixedly arranged on one side, close to the spline sleeve, of the three-gear input gear, and three-gear key grooves matched with the gear-shifting key teeth on the gear-shifting sliding sleeve are formed in the side face of the three-gear driving wheel.

Furthermore, a slot is arranged on the outer side face of the gear shifting sliding sleeve, and a gear shifting fork assembly for shifting the gear shifting sliding sleeve is clamped in the slot.

Further, one end of the connecting sleeve is fixedly connected with the second-gear transmission wheel, and the other end of the connecting sleeve is in spline connection with the second-gear input gear.

Furthermore, the length of the gap between the gear shifting key teeth at the two ends of the gear shifting sliding sleeve is larger than or equal to the thickness of the second-gear transmission wheel, and when the gear shifting sliding sleeve slides to be abutted against the third-gear input gear, the position of the gap corresponds to the position of the second-gear transmission wheel.

Further, the length of the shifting sliding sleeve is larger than the sum of the thicknesses of the second-gear driving wheel and the third-gear driving wheel, and the length of the shifting sliding sleeve is larger than the thickness of the first-gear driving wheel.

Compared with the prior art, the utility model has the following beneficial effects:

(1) Through the slip of gear shifting sliding sleeve for the spline housing respectively with first gear speed change gear set, second gear speed change gear set and three gear speed change gear set power transmission cooperation form 3 different gear power transmission operating modes respectively, the gear shifting simple structure of this scheme only need drive the gear shifting sliding sleeve through the single shift fork and remove and can accomplish the switch, easy operation, convenient.

(2) The transmission assembly used is few, the production cost and the later maintenance cost are reduced, the assembly speed of the reduction gearbox is improved, and the stability and the reliability of the reduction gearbox are improved.

(3) The transmission structure is simple, the number of transmission components is small, the friction loss energy is small in use, and the energy utilization rate is improved.

Drawings

FIG. 1 is a schematic diagram of a spline shaft mounting structure of a three speed transmission mechanism of a reduction gearbox according to the present utility model;

FIG. 2 is a schematic view of the overall structure of a three-speed transmission mechanism of a reduction gearbox according to the present utility model;

FIG. 3 isbase:Sub>A sectional view A-A of FIG. 2;

FIG. 4 is a schematic view showing a first gear shifting state of a three-gear shifting mechanism of a reduction gearbox according to the present utility model;

FIG. 5 is a schematic diagram showing a second gear shift state of a third gear shift mechanism of a reduction gearbox according to the present utility model;

FIG. 6 is a schematic diagram of a three speed state of a three speed transmission mechanism of a reduction gearbox according to the present utility model;

FIG. 7 is a schematic view of the structure of a spline shaft and output gear in a three speed transmission mechanism of a reduction gearbox according to the present utility model;

FIG. 8 is a schematic diagram of the structure of a spline housing in a three-speed transmission mechanism of a reduction gearbox according to the present utility model;

FIG. 9 is a schematic view of a shift sleeve in a three speed transmission of a reduction gearbox according to the present utility model;

FIG. 10 is a schematic diagram of a second gear input gear in a three-speed transmission mechanism of a reduction gearbox according to the present utility model;

FIG. 11 is a schematic diagram of a second gear drive wheel and a connecting sleeve in a third gear transmission mechanism of a reduction gearbox;

FIG. 12 is a schematic view of a first input gear and a first drive wheel in a three speed transmission of a reduction gearbox according to the present utility model;

fig. 13 is a schematic structural view of a third gear input gear and a third gear driving wheel in a third gear speed change mechanism of a reduction gearbox.

In the figure: 1. a spline shaft; 2. an output gear; 3. a spline housing; 4. a first gear input gear; 5. a first gear driving wheel; 6. a shift sleeve; 61. a slot; 7. a second gear input gear; 8. a second gear driving wheel; 9. connecting sleeves; 10. a third gear input gear; 11. a third-gear driving wheel; 12. a shift fork assembly.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

As shown in fig. 1-13, a three-gear speed change mechanism of a reduction gearbox comprises a spline shaft 1, an output gear 2 is fixedly arranged on the spline shaft 1, a spline housing 3 is arranged on the spline shaft 1, a gear shifting sliding sleeve 6 is axially arranged on the outer side of the spline housing 3 in a sliding manner, a first-gear speed change gear set, a second-gear speed change gear set and a three-gear speed change gear set are further arranged on the spline shaft 1 in an idling manner, and the spline housing 3 is respectively matched with the first-gear speed change gear set, the second-gear speed change gear set and the three-gear speed change gear set in a power transmission manner through the gear shifting sliding sleeve 6 in a sliding manner, so that 3 power transmission working modes are respectively formed.

The outside of the spline housing 3 is provided with a gear shift key slot, the gear shift sliding sleeve 6 is internally provided with gear shift key teeth matched with the gear shift key slot, the gear shift key teeth are arranged in the gear shift sliding sleeve 6 at positions close to two ends, and gaps are reserved among the gear shift key teeth at the two ends. The gap is used for giving way, so that the gear shifting sliding sleeve 6 can not drive the transmission components with 2 gears to rotate at the same time during gear shifting, and the normal use of the reduction gearbox is affected.

As shown in fig. 4, the first speed change gear set is located at one side of the spline housing 3, the first speed change gear set comprises a first input gear 4 and a first driving wheel 5, the first driving wheel 5 is fixedly arranged at one side surface of the first input gear 4 close to the spline housing 3 and is coaxially arranged, and a first key slot matched with a gear shift key tooth on the gear shift sliding sleeve 6 is arranged on the first driving wheel 5. When the first gear is used for speed change, the gear shifting sliding sleeve 6 is slid to the position of the first gear driving wheel 5, gear shifting key teeth in the gear shifting sliding sleeve 6 are meshed with first gear key grooves on the first gear driving wheel 5, when the first gear input gear 4 rotates, the first gear driving wheel 5 is driven to rotate, the gear shifting sliding sleeve 6 is driven to rotate, meanwhile, the gear shifting sliding sleeve 6 is meshed with the spline housing 3, the spline housing 3 is further driven to rotate, the spline housing 3 is always meshed with the spline shaft 1, the spline shaft 1 is driven to rotate together, the spline shaft 1 can rotate to drive the output gear 2 fixed on the spline shaft, and the first gear speed change effect is achieved due to the fact that the wheel disc radiuses of the first gear input gear 4 and the output gear 2 are different.

As shown in fig. 5, the second speed change gear set is located at the other side of the spline housing 3 corresponding to the first speed change gear set, and the second speed change gear set comprises a second speed input gear 7, a second speed driving wheel 8 and a connecting sleeve 9 for connecting the second speed input gear 7 and the second speed driving wheel 8, wherein the second speed input gear 7, the second speed driving wheel 8 and the connecting sleeve 9 are coaxially arranged, and a second speed key slot matched with a gear shift key tooth on the gear shift sliding sleeve 6 is arranged on the side surface of the second speed driving wheel 8. When the second gear is used for speed change, the gear shifting sliding sleeve 6 is slid to the position of the second gear driving wheel 8, gear shifting teeth in the gear shifting sliding sleeve 6 are meshed with second gear keyways on the surface of the second gear driving wheel 8, when the second gear input gear 7 is stressed to rotate, the second gear driving wheel 8 is driven to rotate, the gear shifting sliding sleeve 6 is driven to rotate, meanwhile, the gear shifting sliding sleeve 6 is meshed with the spline housing 3, the spline housing 3 is further driven to rotate, the spline housing 3 is always meshed with the spline shaft 1, the spline shaft 1 is further driven to rotate together, the spline shaft 1 can drive the output gear 2 fixed on the spline shaft to rotate, and the second gear speed change effect is further achieved due to the fact that the radius of a wheel disc of the second gear input gear 7 is different from that of the output gear 2.

As shown in fig. 6, the three-gear speed change gear set comprises a three-gear input gear 10 and a three-gear driving wheel 11, the three-gear input gear 10 and the three-gear driving wheel 11 are positioned between the two-gear input gear 7 and the two-gear driving wheel 8, are sleeved on the outer side wall of the connecting sleeve 9 in an empty mode and can rotate freely, the three-gear driving wheel 11 is fixedly arranged on one side, close to the spline sleeve 3, of the three-gear input gear 10, and three-gear key grooves matched with the gear-shifting key teeth on the gear-shifting sliding sleeve 6 are formed in the side face of the three-gear driving wheel 11. When the three-gear speed change is used, the gear shifting sliding sleeve 6 is slid to the position of the three-gear driving wheel 11, gear shifting teeth in the gear shifting sliding sleeve 6 are meshed with three-gear keyways on the surface of the three-gear driving wheel 11, the two-gear driving wheel 8 corresponds to a clearance position in the gear shifting sliding sleeve 6, the gear shifting sliding sleeve 6 cannot drive the two-gear driving wheel 8 to rotate when rotating, when the three-gear input gear 10 is forced to rotate, the three-gear driving wheel 11 is driven to rotate, the gear shifting sliding sleeve 6 is driven to rotate, meanwhile, the gear shifting sliding sleeve 6 is meshed with the spline housing 3, the spline housing 3 is further driven to rotate, the spline housing 3 is always meshed with the spline shaft 1, the spline shaft 1 is driven to rotate together, the output gear 2 fixed on the spline shaft 1 can be driven to rotate, and the three-gear speed change effect is achieved due to the fact that the radius of the wheel disc of the three-gear input gear 10 and the output gear 2 is different.

The outer side surface of the gear shifting sliding sleeve 6 is provided with a slot 61, and a gear shifting fork assembly 12 for shifting the gear shifting sliding sleeve 6 is clamped in the slot 61. During shifting operation, the shifting fork assembly 12 is moved to drive the shifting sliding sleeve 6 to move, so that the shifting sliding is meshed with different driving wheels.

One end of the connecting sleeve 9 is fixedly connected with the second-gear driving wheel 8, and the other end of the connecting sleeve is in spline connection with the second-gear input gear 7. The two-gear transmission wheel 8 and the two-gear input gear 7 are connected through the connecting sleeve 9, the two connecting sleeve 9 is in spline connection with the two-gear input gear 7, machining and production accessories are facilitated, production difficulty is reduced, spline connection is adopted, and assembly is convenient and rapid.

The gap length between the gear shift key teeth at the two ends of the gear shift sliding sleeve 6 is larger than or equal to the thickness of the second-gear transmission wheel 8, and when the gear shift sliding sleeve 6 slides to abut against the third-gear input gear 10, the position of the gap corresponds to the position of the second-gear transmission wheel 8. When the gear shifting sliding sleeve 6 is meshed with the third-gear driving wheel 11, the second-gear driving wheel 8 is in a clearance position, the gear shifting sliding sleeve 6 is meshed with the second-gear driving wheel 8, the third-gear driving wheel 11 is prevented from driving the second-gear rotating wheel to rotate during rotation, and normal use of the reduction gearbox is guaranteed.

The length of the gear shifting sliding sleeve 6 is larger than the sum of the thicknesses of the second-gear driving wheel 8 and the third-gear driving wheel 11, so that the gear shifting sliding sleeve 6 can be simultaneously meshed with the third-gear driving wheel 11 and the spline housing 3, and the spline housing 3 can be driven to rotate when the gear shifting sliding sleeve 6 rotates; the length of the gear shifting sliding sleeve 6 is larger than the thickness of the first-gear driving wheel 5, so that the gear shifting sliding sleeve 6 can be meshed with the first-gear driving wheel 5 and the spline housing 3 at the same time, and the spline housing 3 can be driven to rotate when the gear shifting sliding sleeve 6 rotates.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A three-gear speed change mechanism of a reduction gearbox is characterized in that: the novel gear shifting device comprises a spline shaft, an output gear is fixedly arranged on the spline shaft, a spline sleeve is arranged on the spline shaft, a gear shifting sliding sleeve is arranged on the outer side of the spline sleeve in an axial sliding mode, a first speed change gear set, a second speed change gear set and a third speed change gear set are arranged on the spline shaft in an idling mode, and the spline sleeve slides on the spline sleeve through the gear shifting sliding sleeve, so that the spline sleeve is respectively matched with the first speed change gear set, the second speed change gear set and the third speed change gear set in a power transmission mode, and 3 power transmission modes are respectively formed.

2. A three speed transmission for a reduction gearbox according to claim 1, wherein: the spline housing outside is equipped with the shift keyway, be equipped with in the shift sliding sleeve with shift keyway matched with shift key tooth, shift key tooth locates the position near both ends in the shift sliding sleeve, and leave the clearance between the shift key tooth at both ends.

3. A three speed transmission for a reduction gearbox according to claim 2, wherein: the first-gear speed change gear set is positioned on one side of the spline housing, the first-gear speed change gear set comprises a first-gear input gear and a first-gear driving wheel, the first-gear driving wheel is fixedly arranged on one side surface of the first-gear input gear, which is close to the spline housing, and is coaxially arranged, and a first-gear key slot matched with a gear-shifting key tooth on the gear-shifting sliding sleeve is arranged on the first-gear driving wheel.

4. A three speed transmission for a reduction gearbox according to claim 3, wherein: the second-gear speed change gear set is positioned at the other side of the spline housing corresponding to the first-gear speed change gear set, the second-gear speed change gear set comprises a second-gear input gear, a second-gear driving wheel and a connecting sleeve for connecting the second-gear input gear and the second-gear driving wheel, the second-gear input gear, the second-gear driving wheel and the connecting sleeve are coaxially arranged, and a second-gear key slot matched with a gear shift key tooth on the gear shift sliding sleeve is arranged on the side face of the second-gear driving wheel.

5. A three speed transmission for a reduction gearbox according to claim 4, wherein: the three-gear speed change gear set comprises a three-gear input gear and a three-gear driving wheel, the three-gear input gear and the three-gear driving wheel are positioned between the two-gear input gear and the two-gear driving wheel, the three-gear speed change gear set is sleeved on the outer side wall of the connecting sleeve in a free mode, the three-gear driving wheel is fixedly arranged on one side, close to the spline sleeve, of the three-gear input gear, and three-gear key grooves matched with gear shifting healthy teeth on the gear shifting sliding sleeve are formed in the side face of the three-gear driving wheel.

6. A three speed transmission for a reduction gearbox according to claim 5, wherein: the outer side face of the gear shifting sliding sleeve is provided with a slot, and a gear shifting fork assembly for shifting the gear shifting sliding sleeve is clamped in the slot.

7. A three speed transmission for a reduction gearbox according to claim 6, wherein: one end of the connecting sleeve is fixedly connected with the second-gear transmission wheel, and the other end of the connecting sleeve is in spline connection with the second-gear input gear.

8. A three speed transmission for a reduction gearbox according to claim 7, wherein: the length of the gap between the gear shifting key teeth at the two ends of the gear shifting sliding sleeve is larger than or equal to the thickness of the second-gear transmission wheel, and when the gear shifting sliding sleeve slides to be abutted against the third-gear input gear, the position of the gap corresponds to the position of the second-gear transmission wheel.

9. A three speed transmission for a reduction box according to claim 8, wherein: the length of the shifting sliding sleeve is larger than the sum of the thicknesses of the second-gear driving wheel and the third-gear driving wheel, and the length of the shifting sliding sleeve is larger than the thickness of the first-gear driving wheel.